Does anyboby know if the brake pump is the same for all gen 3

Discussion in 'Prius v Technical Discussion' started by Tim Jones, Nov 8, 2019.

  1. Tim Jones

    Tim Jones Active Member

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    Just trying to find out if the pump is the same for prius and prius v.
    Bought a pump online fro 2013 prius for my v.
    Haven't tore it apart yet to see.
     
  2. bisco

    bisco cookie crumbler

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    a parts search might tell you
     
  3. Georgina Rudkus

    Georgina Rudkus Senior Member

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    They are the same.
     
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  4. Tim Jones

    Tim Jones Active Member

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    I kinda figured that....... seen all kinds of info on the prius......but not the v.... THANKS!!!!!!!!!!!!!!! from Sunny and Warm Texas
     
  5. bisco

    bisco cookie crumbler

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    oh sure, rub it in
     
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  6. Tim Jones

    Tim Jones Active Member

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    I would change it today but to nice........ I'll be riding my GL1800
     

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  7. rjparker

    rjparker Senior Member

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    I think we know the part numbers are different but its not clear if the interchangeability is still there. Also a question remains about the actual failure that causes rapid cycling of the pump. Some indications suggest its a diaphragm in the pump's hydraulic accumulator. Finally, does anyone have the TIS procedures on these parts? There is a recall procedure on the 2010 standard Prius on this site but not the v.

    From an earlier post parts for a 2012 Prius v:
    47070-12020 Booster Pump/Accumulator mcgeorge 696 (also available on ebay from salvage)
    47050-47110 Master Cylinder Mcgeorge 1072
    44785-02060 Gasket, Brake Booster mcgeorge $3.60

    BOOSTER AND MASTER CYLINDER.jpg
     
    #7 rjparker, Nov 9, 2019
    Last edited: Nov 9, 2019
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  8. Tim Jones

    Tim Jones Active Member

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    Looks like a pretty easy change out. Power and pressure plugs and of course proper bleeding.. I will get this changed first rainy day and report in on what happens. From what I've read you get a code if it's the master cylinder. I can see the brake fluid reservoir go down a bit when the pump runs and it goes back up when pump off.
    I'm going to bleed the brakes first before I replace the pump just for the heck of it....... I noticed that my fluid is down a bit and it has always been on full in the last 18 months that I purchased it.
     
  9. Tim Jones

    Tim Jones Active Member

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    I don't have the gasket......I'll order today... Thanks RJP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     
  10. Tim Jones

    Tim Jones Active Member

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    Thanks!!!!!!!!!!!!!!!!!
     
  11. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    Do you have techstream?

    I'll post anything I can dig up, stay tuned.
     

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    #11 Mendel Leisk, Nov 9, 2019
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  12. Tim Jones

    Tim Jones Active Member

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    YES I have Techstream.......
     
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  13. Elektroingenieur

    Elektroingenieur Senior Member

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    How do you know?

    As @rjparker kindly mentioned, Toyota has two different part numbers for them: for all years of the Prius v, the brake booster pump assembly has part number 47070-12020, but for all years of the third-generation Prius, it has part number 47070-47060. I wouldn’t exchange one for the other without more information—unlikely to be available—about why there are different parts, with neither shown as superseded.
     
  14. ChapmanF

    ChapmanF Senior Member

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    The word 'the' up there, as in "the actual failure that causes", might end up making diagnosis more difficult.

    There are a bunch of ways for either the accumulator assembly or the actuator assembly to go bad in a way that causes rapid cycling of the pump. A lot of them will result in codes being set, and sometimes the codes alone might tell you enough to focus on one assembly or the other, but often more investigation will be needed.

    As they are two separate assemblies in Gen 3 and neither one is a picnic to replace, that can be a very interesting question to take up before jumping into the work.
     
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  15. Georgina Rudkus

    Georgina Rudkus Senior Member

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    I checked with my source at LKQ. He said from his data base that they were interchangeable. That's all I know..
     
  16. JayRock_PHX

    JayRock_PHX Member

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    I asked this exact same question few weeks ago. Despite my knowledge of the situation I was told they were not the same
     
  17. Tim Jones

    Tim Jones Active Member

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    Thanks! v ones much harder to find.
     
  18. rjparker

    rjparker Senior Member

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    As I research this a bit more I find the expensive ABS "Master Cylinder" is actually an integrated "Skid Control ECU with Actuator Assembly" as referenced in the wiring diagrams.

    In a Gen 2 Prius, the ecu was separate. I also note the Brake Booster Pump and Accumulator are just that, a simple pump and nitrogen/hydraulic "pressure tank" accumulator under control of the Skid Control ECU/Master Cylinder. In the 2010 recall information, the concern was the accumulator diaphragm between the nitrogen charge and the hydraulic fluid would leak.

    While this does not clarify things much it probably guarantees that the Skid Control/Master Cylinder must be the same in order to communicate and logically function on the CAN network. The Booster interchangeability may be another matter. Pic is just a portion of a multi-page schematic (2012 Prius v) centered around the Skid Control/Master Cylinder.

    A second attachment is a detailed Gen 2 explanation of the system. It would be good to find a Gen 3 version.

    Brake Booster Wiring abs control.jpg
     

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    #18 rjparker, Nov 10, 2019
    Last edited: Nov 10, 2019
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  19. Elektroingenieur

    Elektroingenieur Senior Member

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    The New Car Features manuals (more info) for the Prius v and 2010–2015 Prius have a general overview of the electronically controlled brake systems in each model, including internal diagrams of the booster pump assemblies, in which I didn’t notice any obvious differences. I didn’t see anything to answer @Tim Jones's question about whether the two versions of the pump assembly are interchangeable, however. Service technicians are expected to use the application information in the Electronic Parts Catalog, so it’s not necessary for Toyota to discuss minor engineering differences between models in the other publications.

    In photos I’ve seen, the two kinds of pump assemblies are superficially similar, with ADVICS logos in the castings and the same style of electrical connectors, but with different part numbers, clearly marked. There could be internal differences, such as a different rating for the motor, or a change to address a mechanical vibration or electromagnetic compatibility issue. Indeed, there may be a reason the circuit diagram for the Prius v (posted above) shows inductors and capacitors in the pump assembly, but the diagram for the Prius does not.
     
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  20. Tim Jones

    Tim Jones Active Member

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    These cars are a pain in the v!
     
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